<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>

<script type="text/javascript">
	function check() {
		var name=document.getElementById("id").value;
		var password=document.getElementById("password").value;
		
		if(name==null||name==''){
			alert("id为空");
			return false;
		}
		
		if(password==null||password==''){
			alert("password为空");
			return false;
		}
		
		return true;
	}
</script>


<body>
	
	
	<div>
		<form id="form_login" action="login" method="post" onsubmit="return check();">
			<label>id:</label>
		 	<input type="text" id="id" name="id">
			 <label>password:</label>
		 	<input type="password" id="password" name="password">
		 	<input type="submit" value="submit">
		</form>
	</div>
</body>
</html>